TLDR
journalctl --vacuum-size=100M #remove all logs, only retain 100mb pacman -Scc #remove all package installation files (obsolete and current) pacman -S bleachbit bleachbit -c system.*
First, what's big on the system
du -d1 -h / 2>/dev/null | sort -h
This shows a sorted list of the largest dirs in `/`
You can do two levels down:
du -d2 -h / 2>/dev/null | sort -h
My result is:
0 /proc 0 /sys 0 /tmp 12K /dev 12K /srv 16K /lost+found 632K /run 4.3M /boot 13M /opt 15M /etc 75M /root 93M /home 2.4G /var 3.2G /usr 221G /mnt 227G /
I ignore /mnt (because that's an external drive)
Two dirs stand to mind: var and usr.
Let's see what's inside:
du -d1 -h /var /usr 2>/dev/null | sort -h
Then, a little bit deeper:
du -d1 -h /var/log /usr/share /usr/lib /var/cache 2>/dev/null | sort -h
Let's start with the logs
I have 717mb in /var/log.
I'm not a fan of deleting directories randomly, so let's do it the clean way:
$ journalctl --disk-usage Archived and active journals take up 728.7M on disk.
Let's leave only 100mb of logs:
journalctl --vacuum-size=100M ... Deleted archived journal /var/log/journal/ba5391...b.journal (8.0M). ... Vacuuming done, freed 616.6M of archived journals on disk.
More info here on how to configure journalctl here.
Packages
I have 660M /var/cache/pacman. It was 1.8gb, but I ran pacman -Sc to remove unused packages. Let's remove the rest:
pacman -Scc
/usr/share/locale
A lot of users do remove it, or at least clean it up. But I might be a problem. But checkout bleachbit (next paragraph).
Bleachbit
Automatic cleaner. Will delete a lot of stuff, but for it was mostly locales.
$ pacman -S bleachbit $ bleachbit -p system.* Disk space to be recovered: 488.8MB $ bleachbit -c system.*
You can look for more stuff to delete:
bleachbit --list bleachbit -p thunderbird.*